No halos. My old ebay projectors did and they looked neat, but I decided against them in my retrofits. You could wire them to the DRLs, or any switched 12v source.

http://www.youtube.com/watch?v=-1Car4RCamE

watch that starting at 1:10 in and it shows you exactly where it is. You do NEED to either tape it or heatshrink it because there will still be power to it which can short out against the metal support under the dash.